<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title></title>
        <style type="text/css">
            .d1{
                width: 200px;
                height: 100px;
                background-color: #fdd;
            }
            .d1:hover{
                width: 600px;
                height: 100px;
                background-color: skyblue;
                transition-property: width,background-color;
                transition-duration: 1s,1s;
                transition-timing-function: ease;
                transition-delay: 1ms;
            }
        </style>
    </head>
    <body>
        <div class="d1"></div>
    </body>
</html>